Hi,
I would add two arguments to the motivation section of Raphael's document
"Implementing OWL in Datalog":
Learning:
It is important to offer a paradigm that is not too far away from paradigms
people are already familiar with, e.g. UML, in general object oriented
concepts. We have to be able to reach these kinds of persons in order to
achieve impact in the commercial world.
Application Interoperability:
Interoperability between applications can be better achieved in case you
can make the statement: "Application is OWL LITE compatible". Then you know
immediately if two applications rely on the same OWL level. Otherwise you
have to check the used primitives one-by-one.
Regards
Rudi